Apparatus for protecting steam-turbines against rust.



R. J. DUPUY. APPARATUS FOR PROTECTING STEAM TURBINES AGAINST RUST.APPLICATION FILED SEPT- v2. 1911.

1,Q82,680m Patented Oct. 22, 1918.

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neeaeeo. If 4 name JULES nurux, or rams, manor, nssren'on To comrncmnGENERALE DELECTRIGITE, OF PARIS, FRAN' CE, A CORPORATION OF FRAN'C E.

APPARATUS FOR PROTECTING STEAM-TURBINES AGAINST RUST.

I .do herebydeclare the following to'be-fla' full, clear, and exactdescriptionf. the 'l'n-j vention, such as will enable others skilled 1nthe art to which itp ertains to m l e and use the same;

The present invention .relates'to-steam turbines and jhas'jfor itsobjecttfo roteet the fixed and movi blades, diskaan other: ue to thepresenee'jof moisture which remains in or --gain'siacce ss parts againstrust time whenit. is stopped. I

The invention consists in applying to the turbine a blower which,"during the operation of the turbine, is cut oil by a valve which isopened at thetime of stopping so to the interior. of the turbine duringthe as to cause the turbine to be traversed by a. current of dry airwhich takes up the re-' maining partlcles of water-and maintains in theinterior of the machine a dry atmosphere, thereby avoiding rust. Theairblown in can be heated by means ofa. heating device interposedimmediately afterthe blower. r

The accompanyingdrawings show byway of example diflerent arrangements ofappa-i ratus forming the vobject of the invention'.. I

Figure 1 is "a diagrammatic --elevat1 on partly sectional of I a turbineprovidedwith a ventilating device. r h Fig. 2 is a. similar diagrammaticelevat on of a modification; 1

' The turbine "is shown at T, T designates the admission pipein'whichisinterposed a valve A serving to': control the steam. A;-

valve B 'permit's'fthe interior of the turbine (admission end) to beplaced in communication with the atmosphere. At the opposite end ofthe'turbine is located a blower -V separated from the turbine by a valve0.

A device R applied to the conduit for the air from the blower .V servesto heat the air, so thata current of dry air is constantly obtained.During the times, when the turbine Specification of Letters Patent.Application filed September 12, 1917'. 1Seria1No. 190,958.

v T i toppedlthe valve 'JULEs DUP the particles of water remaining andmaintains in the interior. of-the machine an atmosphere sufiiciently dryto avoid rust of the -:o1xidizable metallic parts. Y .I

-"The' heating device shown in Fig. 1 is constituted by a resistanceD'through which an-electric current passes.

Flg. 2-shows a modification in which the mounted on the exhaust pipe G.In this example the heating apparatus shown at S is formed of a jacketedtube within the outer envelop of Which a current of steam iLI'I'lV-r mgby the tube E is caused to circulate, tube F serving for the escape ofthe condensed water. a

It is well understood that modifications can be made in the inventionand the blowing'apparatus mounted either on the body of the turbine T oron the condenser itself, or on another part in communication with theexhaust. "Iclaim: a

:;1. A steam turbine including a: valve in thefist eam inlet pipeadapted to establish if communication between the interior of theturbine and theatmosp'here, and means, for

' w ng hro gh the turbine and out'of said Valve; V i

2-. A- steam turbine including a valve in the steam inlet pipe adaptedto establish communication between the interior of the turbine'and theatmosphere, means forblow- Patented ca. a, rare.

the admission current ofair which is dry blower V and its accessoryapparatus are l ing air through the turbine and out of the valve, andmeans for controlling the flow of said air.

3. A steam turblne including a valve on lone side of the rotor adaptedtoestablish communication between the interior of the turbine and theatmosphere, and means on the opposite side of the rotor for blowing airthrough the turbine and out of said valve. 4. Asteam turbine including avalve on one side of the rotor adapted to establish In testimony whereofI eflix my signacommunicatior}; between lthe interlor of tlmle ture, inpresence of two witnesses. turbine and t e atmosp xere, means on t e vOpposite side of the rotor for blofving air RENE JULES DUPUY' 5 throughthe turbine and out of sand valve, Witnesses:

and means for heating theeir as it passes JOSEPH GEMENIE, from theblower to the turblne. D, H, LAWSON,

